Crown Boiler Phantom X series, Installation And Operating Instructions Manual, Page: 56 / 136

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Figure 36: Gas Inlet Pressure Tap and Pressure Switch Location
VII. Gas Piping
(continued)
C. Pressure test.
See Table 33 for Phantom X Min./
Max. Pressure Ratings. The boiler and its gas
connection must be leak tested before placing boiler in
operation.
1. Protect boiler gas control valve.
For all testing
over ½ psig (3.4 kPa), boiler and its individual
shutoff valve must be disconnected from gas supply
piping. For testing at ½ psig (3.4 kPa) or less, isolate
boiler from gas supply piping by closing boiler’s
individual manual shutoff valve.
2. Locate leaks
using approved combustible gas non-
corrosive leak detector solution.
DANGER
Explosion Hazard. Do not use matches, candles,
open flames or other ignition source to check for
leaks.
D. Phantom X Model PHNTM500C
(if equipped
with optional low and high gas pressure switches)
1. Use a lock-up type gas pressure regulator.
Some examples of lock-up regulators are listed
below:
• Sensus Model 143-80
• Pietro Fiorentini Governor, Standard Model
• Dungs FRS Series
NOTICE
Use a lock-up type gas pressure regulator
when low and high gas pressure switches are
installed. Older or non-lock-up type regulators
may result in nuisance lockouts on gas pressure
droops or spikes.
2. Verify low and high gas pressure switch
settings
are within the range shown in Table 33.
The switches are preset for natural gas. For LP gas,
the low gas pressure switch setting must be adjusted.
3. The low gas pressure switch
must be reset after
the boiler is piped to the gas supply and before it is
fired.
4. For the low and high gas pressure switches
proper operation, the boiler inlet gas pressure must
be within the range shown in Table 33.
5. The gas pressure can be measured
at the gas
valve inlet pressure port. Refer to Figure 36 “Gas
Inlet Pressure Tap and Pressure Switch Location “.
6. If either pressure switch is tripped,
it must be
manually reset before the boiler can be restarted.
PHNTM500